Jump to content
duffymahoney

Duffy's 1/71 Series 1 240z build

Recommended Posts

Well it runs, but terrible.  I have a massive vac leak, either from my balance bar not sealing or maybe a throttle body wasn't bolted down correctly.  Even with throttle plates in the full closed position it runs happily at 900 rpms. So it's getting a ton of air from somewhere.  

  • Like 2

Share this post


Link to post
Share on other sites
On 3/30/2020 at 7:21 PM, duffymahoney said:

Well the 80s bmw iac is awesome, smaller and nice looking. Let’s no air or minimal amount by when physically closed Now to find out what pin is positive. 

E6023F90-CB58-41F5-87DA-3FBAFF005376.jpeg

3583DCB7-EB8D-476C-BD83-CC8267DA4BC5.jpeg

Can you share a part # or specific BMW make/model/year?

 

Share this post


Link to post
Share on other sites

Well we finally got a block that passed sonic testing. It took 4 to get one that can handle the 88.5 pistons. N42 for the win! Thanks Andrew Kazanis! It’s going to be a sweet motor.

B656C2CC-C908-4214-842C-965381E07FBD.jpeg

Share this post


Link to post
Share on other sites

Engine builder is removing the casting flash and de-burring the block today. Getting ready for Glyptol coating. Pretty neat. 

B6097D93-83E3-4977-AE8A-7BFC8D4EA941.jpeg

99951463-4E22-40FB-8825-976F0A809677.jpeg

8FF6528E-021F-4FC7-82B6-6DD62BC308FD.jpeg

Edited by duffymahoney

Share this post


Link to post
Share on other sites

3.2L engine parts arrived from Rebello today! 

JE Pistons, Eagle rods and king race bearings. Rod bearing clearances are spot on. Marine Crank did a fanstatic machining job on my extra long stroke LD crank.

9D214B2C-1565-4DDF-B434-49009ACFD7C8.jpeg

826256E6-D208-4E10-ADBD-2A50BC898AD4.jpeg

49BC3A4D-1C75-4107-AFE3-0B3BDC27DDF1.jpeg

F5510DDB-19FF-4E18-8226-253DA0094940.jpeg

FDC97142-5C95-4024-B701-4BE5CBD08BF0.jpeg

7C22A944-680B-4A79-80CC-8B2E395B27FD.jpeg

Share this post


Link to post
Share on other sites

So what is in the Rebello 3.2 kit?

What do you have to provide?

What head will you pair with it?

Share this post


Link to post
Share on other sites
1 hour ago, Patcon said:

So what is in the Rebello 3.2 kit?

What do you have to provide?

What head will you pair with it?

It requires you have a diesel crank to offset grind and a block that will go to at least 89mm - I believe.

Thats the way mine is anyway . You can pair is with any head with any compression - that’s a matter of preference . I think he can make a 3.0 out of any L28 block and crank . To get the extra .2 required a longer stroke . 
I sent my diesel crankshaft and a N42 block and $$$ and I got back all the ingredients to put one together . Rebello preps  the block and crank - custom pistons and all bearings . 

  • Like 1

Share this post


Link to post
Share on other sites

I have the LD crank and N42 block. What’s a ball park figure for Rebello’s parts and labor?

Share this post


Link to post
Share on other sites
7 hours ago, Yarb said:

I have the LD crank and N42 block. What’s a ball park figure for Rebello’s parts and labor?

I think the kit was 2600 approx

Share this post


Link to post
Share on other sites
On 5/13/2020 at 12:07 AM, duffymahoney said:

3.2L engine parts arrived from Rebello today! 

JE Pistons, Eagle rods and king race bearings. Rod bearing clearances are spot on. Marine Crank did a fanstatic machining job on my extra long stroke LD crank.

9D214B2C-1565-4DDF-B434-49009ACFD7C8.jpeg

826256E6-D208-4E10-ADBD-2A50BC898AD4.jpeg

49BC3A4D-1C75-4107-AFE3-0B3BDC27DDF1.jpeg

F5510DDB-19FF-4E18-8226-253DA0094940.jpeg

FDC97142-5C95-4024-B701-4BE5CBD08BF0.jpeg

7C22A944-680B-4A79-80CC-8B2E395B27FD.jpeg

Your pistons look just like mine with the dish . What CR are you shooting for and what CC chamber in the head ?

Share this post


Link to post
Share on other sites
2 hours ago, Yarb said:

That included his machine work?

 

No. I think a fully built Rebello motors are 8-20k. 
 

I didn’t get a Rebello kit. Just parts we needed. 
 

10:1 is the goal. I will only use ethanol free premium. 

Share this post


Link to post
Share on other sites

15 hours ago, Patcon said:

So what is in the Rebello 3.2 kit?

What do you have to provide?

What head will you pair with it?


From Rebello 

I got titanium valve retainers, pistons, rods, bearings etc...

I will be using a ported and bigger valve E31.

Machine work will all be done locally. 

Crank repair and stroke was done by Marine Crankshaft.  

  • Like 1

Share this post


Link to post
Share on other sites

So not using the LD28 block?

That goes to 3.4L, doesn't it. I believe it requires a custom crank though

Share this post


Link to post
Share on other sites
5 minutes ago, Patcon said:

So not using the LD28 block?

That goes to 3.4L, doesn't it. I believe it requires a custom crank though

No. Just a N42 block bored. I’m not chasing a ton of hp. The 3.4+ is a lot of work and $. 
 

I actually think I will be at at 3.16 or something. But that sounds dumb. So 3.2L 

Share this post


Link to post
Share on other sites

I've got an LD28 block and crank build on the go. At 84x90 (stroke/bore) It's still only 3.2. The Rebello 3.35 is an 89mm custom Crower crank.

  • Like 1

Share this post


Link to post
Share on other sites

Duffy you've done some great work to this S1 240z! I've been lurking for a while. Nice to see some chronological history of your build instead of just Facebook.

- Jeremy Wilbur

Share this post


Link to post
Share on other sites

17 hours ago, 73str86 said:

Duffy you've done some great work to this S1 240z! I've been lurking for a while. Nice to see some chronological history of your build instead of just Facebook.

- Jeremy Wilbur

Thank you! Trying to make it a blast to drive, tinker, but also I can go back to bone stock fairly easily.  

Share this post


Link to post
Share on other sites

Well injectors are back and I have efi spark plugs. 
 

I spent a while tuning this weekend and with Tioga’s help I think I finally found one of my major problems.  The tps was set at its highest sensitivity. It would bounce from .34-.49. Thus causing the ecu to think it needs to apply timing and fuel and making it run terrible. I turned it to the lowest and it’s rock solid at 0% and .01 of a voltage change. 
 

Haltech is a nice system. But wow is there a lot of settings. 
 

If anyone needs Z car help. I would recommend Tioga with Automotive Solutions! 

  • Like 2

Share this post


Link to post
Share on other sites
On 5/2/2019 at 11:32 PM, duffymahoney said:

I screwed something up in the trans rebuild, it becomes tight with the front cover on, plus I guess I love spending money, so I decided on the KA swap for my 240z.  This is a longer tail shaft on the trans, so it should fit in my series 1 better (no cutting), plus the 1st is better gear ratio and 2nd is slightly better.  I found a 1989 240sx trans, with 576 miles on it.  It's been in storage inside since 12/01/89!  Zinc is still in tact.  Paid too much for it, but hopefully it's good.  The shop tested all the gears and syncros.  

IMG_1680.JPG

Digging up this older post. I have a series 1 to, still stock 4 speed. Do you have to cut the trans tunnel at all with the SX gearbox? I don't want to cut it and the idea of a 90§ bent shifter isn't appealing to me. So a SX 5spd swap might be the solution...

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.